The answer strongly depends on the kind of igneous rock and other local conditions. There are many kinds of igneous rock, and too many variables to give a simple answer to an overly-simple question.
molten rock because it sturdy and it can keep your fire burning;)
Niether. Volcanic rock is a mixture.
Pumice is a frothy, bubbly, light volcanic rock.
Common, hihgly porous types of volcanic rock are pumice and scoria.
That varies widely between different types of volcanic rock. Obsidian or volcanic glass, is harder then pumice, but both are volcanic rocks.
molten rock because it sturdy and it can keep your fire burning;)
moving of tectonic plates and the build up of pressure within the volcanic mountain under the dried up lava which became rock after the previous volcanic eruption
Yes,it is a volcanic rock.
No. Volcanic rock is not flammable.
Volcanic islands are formed by volcanoes and are therefore composed of volcanic rock.
Niether. Volcanic rock is a mixture.
Kimberlite is a volcanic rock. Kenyte is a volcanic rock found on Mount Kenya.
Volcanic rocks are considered igneous.
No. Obsidian is just one of many types of volcanic rock.
is a volcanic eruption part of the rock cycle
Volcanic activity produces extrusive igneous rock.
is a volcanic eruption part of the rock cycle